Type-writing machine.



No. 775,394. PATENTBD NOV. 22, 1904. B. B. GRAM.

TYPE WRITING MAG-HINE.

APPLICATION FILED MAY 17, 1901.

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No. 775,394. PATENTEDNOV. 22, 1904 E. B.' ORAM.

TYPE WRITING MACHINE.

APPLICATION FILED MAY 17. 1901.

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H25 ATTEJRNEY Patented November 22, 1904.

UNITED STATES PATENT OFFICE.

EDXVIN B. ORAM, OF BROOKLYN, NElV YORK, ASSTGNOR- TO \VYOKOFF, SEAMANS & BENEDICT, OF IL ION, NEW YORK, A CORPORATION OF NEWV YORK.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 775,394, dated November 22, 1904,

Application filed May 17,1901. Serial No. 60,633. (No model.)

ple vibrator for causing the ribbon to cover and uncover the printing-point at each typestroke, and another object is to provide means I at said vibrator for aiding the rebound of the type-bars from the platen.

To these ends the invention consists in certain combinations of devices, features of construction, and arrangements of parts, all as will be fully hereinafter described, and particularly set forth in the concluding claims.

In the accompanying drawings, Figure 1 is a central vertical section taken longitudinally of a front-strike writing-machine embodying my improvements, the parts being shown in normal position. Fig. 2 is a view illustrating the printing position of the ribbon-vibrator and typebar shown at Fig. 1. Fig. 3 is a front view illustrating the parts in normal position.

In the several views only so much of the machine is illustrated as pertains to my invention.

Similar parts are designated by similar numerals of reference.

The frame of the machine comprises base 1, corner-posts 2, and top plate 3. In the base are mounted key-levers i, which are connected by links 5 to bell-cranks 6, the latter being mounted upon brackets 7, fixed upon a segment 8 and having toothed arms 9, which mesh with toothed hubs 10, provided upon rearwardly-striking type-bars 11, which are pivoted at 12 in brackets 13, mounted upon a segment 1 1. At their forward ends the typebars rest upon a curved pad 15. Upon the depression of any key-lever the rod 5 is pulled down and the bell-crank 6 vibrated, whereby the type-bar 11 is swung up to print.

platen 16, upon the front side whereof the type impressions are made, travels longitudinally over the lop plate and is connected to a letter-spacing rack 17, the latter being controlled by spacing-dogs carried upon the upper end of a rocker 18, which supports, by means of links 19, a universal bar 20, the latter extending transversely beneath the keylevers, so that at each key operation the platen is enabled to move a letter-space in the usual manner.

Upon either side of the machine and forwardly of the platen is suitably mounted a pair of ribbon-spools 21, the ribbon extending across the machine from spool to spool forwardly of the platen and being threaded through a guide which is provided upon the upper end of a vibrator 22 and consists of a fork 23, formed upon said vibrator, and a fork 24, mounted just in rear thereof. The vibrator stands just in front of and a little below the printing-point, so as to disclose the writing, and at its lower end is bent rearwardly at 25 and pivoted at 26 upon the lower end of a bracket 27, depending from the under side of the top plate It will be per ceived that the entire weight of the vibrator is forward of the pivot 26, and hence that the vibrator constantly tends to drop away from the printing-point. For limiting its drop I provide an adjustable stop-screw 28, which passes rearwardly through a vertical slot 29, formed in the lower end of the vibrator, and is threaded at its rear end into the bracket 27, the head of the screw overhanging the sides of the slot, and hence serving as a support or stop for the vibrator.

The rearward movements of the vibrator are produced by the impact of the type-bars during the last portion of the printing strokes and are limited by an adjustable nut or nuts 30, arranged upon the screw 28.

Fixed upon the lower end of the upright arm 22 of the vibrator is an upwardly-directed leaf-spring 31, whose upper end normally stands ajar from the upper end of the vibrator and is adapted directly to receive the impact of the type-bars, the upperend of said spring being forked at 32, so as to afiord an opening for the types and the blowsof the type-bars being received upon the cross-arm portion of the fork.

When the type-bar in moving toward the platen strikes said spring 31, it is forced rearwardly, together with the vibrator 22, until the latter is checked by the nut 30, whereupon by the further movement of the type-bar the spring 31 is flexed toward said vibrator until the Fig. 2 position is reached. Upon the release of the key the spring 31 aids in throw ing the type-bar away from the platen, the fulcrum or hearing of said spring consisting of the lower portion of the vibrator-arm 22, the latter bearing against the nut 30. As soon as the spring has regained its normal position with reference to said vibrator or becomes unflexed both the spring and the vibrator follow the type-bar or drop until arrested by the head of the screw 28.

It will be seen that the screw 28 may be adjusted so as to allow the vibrator to drop more or less away from the platen and that the nut 30 may be adjusted so that the ribbon may be brought as close as desired to the platen before the vibrator is arrested. The slot 29, which is formed in both the lower end of the spring 21 and the lower end of the vibrator 22, may be of considerable length, so as to allow the required range of adjustment.

l/Vhat I claim as new, and desire to secure by Letters Patent, is

1. In a type-writing machine, the combination with a platen and a series of type-bars, of a ribbon-vibrator, and a separate member adapted to be struck by the type-bars as they approach the platen, and to transmit the motion to said ribbon-vibrator.

2. In a type-writing machine, the combination with a platen and a series of type-bars, of a ribbon-vibrator having a yielding part which is struck by the type-bars as they approach the platen and which stands in front of the platen and normally tends away therefrom and which is moved rearwardly toward the platenby the impact of the type-bars; and stops for limiting the movements of the vibrator toward and away from the platen.

3. In a type-writing machine, the combination with a platen and a series of type-bars, of a ribbon-vibrator having a yielding part which is struck by the type-bars as they approach the platen and which is arranged forwardly of the printing-point and pivoted at its lower end below the platen; said part normally tending away from the platen, and moving rearwardly upon its pivot by the impact of the type-bars; and stops for limiting its movement toward and away from the platen.

4. In a front-strike writing-machine, the combination with a platen and a series of typebars, of a ribbon-vibrator 22 standing in front of the printing-point and having a bent lower portion 25 pivoted at 26 to a bracket 27, said vibrator having a part which is struck by the type-bars as they approach the platen, whereby the vibrator is moved rearwardly toward the platen upon said pivot 26, the weight of the vibrator tending constantly to swing it forwardly away from the platen.

5. In a front-strike writing-machine, the combination with a platen and a series of typebars, of a ribbon-vibrator 22 standing in front of the printing-point and having a bent lower portion 25 pivoted at 26 to a bracket 27, said vibrator having a part which is struck by the type-bars as they approach the platen, whereby thevibrator is moved rearwardly toward the platen upon said pivot 26, the weight of the vibrator tending constantly to swing it forwardly away from the platen, stop-screw 28' threaded into bracket 27, and nut 30 upon said screw.

6. In a front-strike writing-machine, the combination with a platen and a series of typebars, of a ribbon-vibrator 22 standing in front of the printing-point and having a bent lower portion 25 pivoted at 26 to a bracket 27, said vibrator having a part which is struck by the type-bars as they approach the platen, whereby the vibrator is moved rearwardly toward the platen upon said pivot 26, the weight of the vibrator tending constantly to swing it forwardly away from the platen, stop-screw 28 threaded into bracket 27 nut 30 upon said screw, and slot 29 formed in said vibrator for said stop-screw 28.

7. In a front-strike writing-machine, the combination with a platen and a series of typebars, of a ribbon-vibrator arranged forwardl y of the platen and movable toward and away from the platen, means for limiting the movement of the vibrator toward the platen, and a spring mounted upon said vibrator and stand-.

ing forwardly thereof and in the path of the type-bars, said spring being flexed by the typebars during their printing strokes.

8. In a front-strike writing-machine, the combination with a platen and a series of typebars, of a ribbon-vibrator arranged forwardly of the platen and pivoted therebeneath, a spring secured at its lower end to said vibrator and directed upwardly in front thereof and standing forwardly from said vibrator and in the path of the type-bars, said vibrator and in the path of the type-bars so as to be flexed by the latter, slot 29 formed in the spring 31 and vibrator 2Q, screw-stop 28 passing rearwardly throughsaid slot, and nut 30 upon said screw.

10. In a writing-machine, the combination with a platen and a series of type-bars, of a ribbon-vibrator, and a spring member adapted to be struck by the type-bars as they approach the platen, said member operating to actuate said rilwon-vibrator.

11. In a writing-machine, the combination with a platen and a series of type-bars, of a ril)bon-vibrator, and a spring adapted to be compressed by the type-bars as they approach the platen, said spring tending when compressed to operate the ribbon-vibrator and to return the type-bars toward normal position.

12. In a writing-machine, the combination with a platenand a type-carrier, of a yielding i EDWIN B. CRAM Witnesses:

K. V. DONOVAN, E; M. VVELLS. 

